彩色图像的双随机相位加密隐藏技术  

Double Random Phase Encoding Technique of Color Image

作　　者：范金坪[1] 张永林[1] 

机构地区：[1]暨南大学理工学院光电工程系,广州510632

出　　处：《微计算机信息》2009年第27期20-22,共3页Control & Automation

摘　　要：在双随机相位加密的基础上,对彩色图像的加密和解密技术进行研究。首先将原始隐藏图像分离为红(R)、绿(G)、蓝(B)三个颜色通道,在RGB三基色通道中分别用双随机相位编码技术进行编码,然后用编码图像构造一个新的编码图像矩阵。将原始彩色宿主图像也分离为R、G、B三个颜色通道并构造新的宿主图像矩阵。将相应颜色通道的构造图像矩阵进行加密融合,则加密后的融合图像中不仅包含原始宿主图像信息还包含编码信息的实部和虚部。在接收方通过简单的提取和解码运算就可以重构出原来的彩色图像。用MATLAB对该方法进行模拟试验,结果表明该方法能够得到非常好的重构彩色图像。A new technique of color image encryption based on double random phase encoding technique is proposed. The image to be encrypted is first segregated into three color channels： red （R）, green （G）, blue （B）. Double random phase encoding is implemented in each of these channels respectively and then three new coding image matrixes are constructed. The original color image is also segregated into tricolor channels and three host image matrixes are constructed. The constructed image matrixes are merged in each color channels. Not only the original image but also the real part and the imaginary part of the encoding data are contained in merged matrixes. In the receipted side simple extracted and decode operations can be employed to construct the original color image. Computer simulations were done in MATLAB and the results demonstrate that the recovered color image can be obtained high quality by employing this algorithm.

关 键 词：图像处理 图像加密 双随机相位编码 密钥 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]